Research Of Production And Application Technology Of Wet-mixed Mortar

Wet-mixed mortar is made of a certain proportion cement, sand and water-thickeningmaterial, fly ash or other mineral admixtures, additive, the water and so on. In the centralizedmixing plant (factory) after measuring, mixing, with mixing transporter to use site, stored in asealed container, the domestic demand and within the prescribed time after use of mortar mixture.Promote the use of wet-mixed mortar is a technology revolution in construction industry.Whether for renovation or new buildings, wet-mixed mortar plays a very important role. It isdifferent from the traditional field since the mortar of the original operating mode. Implements theindustrialized production, not only makes the quality of the products, to guarantee the enhancedthe stability of the products, improve the quality of the construction project, to meet the needs ofmodernization construction; But also reduce environmental pollution, reduce labor intensity,improve the efficiency of construction, to build a resource-conserving and environmentallyfriendly society has an important significance.Not only cost model of wet-mixed mortar has been studied, wet-mixed mortar productiondistribution cost model is established, contrastive the cost of mortar analysis with the wet-mixedmortar, dry-mixed mortar, site-mixed mortar, and puts forward the optimal distribution way; butalso fineness modulus of aggregate and cement ratio, mineral admixtures and super-plasticizer, theregulator has been studied, and analyzed the factors affecting the performance of mortar; Bychanging the opening-time regulator dosage, the determination of basic changes in theperformance of mortar, comprehensive consideration to determine the opening time of mortar; Putforward the construction process of wet mixing mortar, reduce mortar quality common fault. Themain research conclusions are as follows:1, Under certain conditions, site-mixed mortar, wet-mixed mortar, dry-mixed mortar ofcomprehensive cost increase in turn. Wet-mixed mortar comprehensive cost as the distributiontimes, distance increase continuously. The best production delivery model of wet-mixed mortar iscentralized production, concentrated distribution, in this distribution mode of comprehensive costis the small price differ between wet-mixed mortar with site-mixed mortar.2, Choose the fineness modulus of sand range of2.29-2.57, the ratio of6.50,the mortar has a moststability, the compressive strength and flexural strength, better water-retention, mortar secretewater better.3, Calcium carbonate powder is ideal for wet-mixed mortar admixtures. The optimum blendingquantity is150kg, because the mortar in the dosage for150kg of mortar is the most stableperformance.4, Etherification poly carboxylic acid super-plasticizer is more suitable than naphthalene seriessuper-plasticizer as a slurry of super-plasticizer added to the actual engineering application.Etherification of poly carboxylic acid super-plasticizer dosage for10kg, the stability of the slurryis the best, the indicators of mortar can meet the requirements, and obtain the biggest economicbenefits.5, Contrast sodium gluconate with open-time regulator in the same dosage of retarder, two groupsof retarding effect of mortar is very close, but open-time regulator of cement mortar mixed with open time is larger than that of mortar mixed with sodium gluconate setting time slightly longer.6, Puts forward a new concept–open-time, open-time is a whose hands wet-mixed mortar fromproduction to the construction site of comprehensive index of the stability on the properties ofwet-mixed mortar is very demanding.7, Because the relevant construction technology standard procedures in plaster mortar not clearnot strict, especially at the grass-roots level interface processing this part of the requirements arenot clear, lead to actual engineering construction practice, although carried out in accordance withthe specification requirements, also can have great randomness. This paper in view of the wallinterface processing, put forward the more strict construction requirements and constructionmethod of requirement fantasy even, number of fantasy shear wall above5mm diameter not lessthan10per square decimeter, brick wall surface fantasy5mm in diameter of not less thanfive/square decimeter, etc. The new construction technology can effectively reduce the emptydrum cracking such as quality problems.